Yam is common in our life. Because of its good functions of nourishing and strengthening, helping digestion and stopping diarrhea, it is often used as a medicine, which has good medicinal value, and has a good effect on treating diarrhea due to spleen deficiency, frequent urination and indigestion. Poria, also known as Fu Tu and Fu Ling, also has good medicinal value, and is good for promoting diuresis, invigorating spleen and calming the nerves.